@misc{indiciaefc4cb6930502,
  title = {REPETITION AND TASK DIFFICULTY.},
  author = {P B WARR},
  year = {1964},
  doi = {10.1038/202422a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/14152857/},
  note = {Source identifier: 14152857}
}